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All snake oil is always temporary, no one knows how temporary is temporary. It is better to locate the leak and fix it. OTOH, it is not expensive to give it a shot. Unlikely to cause any harm.
Any leak has a tell tale sign, like a oily patch. If you suspect leak around the low pressure sensor then you may notice a wet oily patch near the receiver drier. Most likely is the compressor shaft o-ring or the condenser. If the leak is the evaporator inside the car then you are screwed. Very difficult/expensive to replace. I think I have spilled my gut. Good luck.
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